The comparison table of the characteristics of PCB outer copper thickness and inner copper thickness is as follows:
1. Outer copper thickness:
The outer copper thickness is usually between 1-5oz (ounces), and the more common ones are 1oz, 2oz, 3oz and 4oz.
The greater the thickness of the outer copper layer, the stronger the load-bearing capacity of the circuit board, and the better the anti-interference performance and conductive performance will be.
The increase in outer copper thickness will also lead to increased costs and increased manufacturing difficulty.
The choice of outer copper thickness should also take into account factors such as plating and etching.
2. Inner copper thickness:
The inner layer copper thickness is usually used for internal connections and signal transmission of circuit boards, and its selection also depends on the application requirements and design needs of the circuit board.
The thickness of the inner copper layer is generally between 0.5-2oz, and the more common ones are 0.5oz, 1oz and 2oz.
The choice of inner copper thickness should be determined taking into account signal transmission requirements.
The thickness of the inner copper layer will affect the impedance and signal transmission performance of the circuit board.
To sum up, the outer copper thickness and inner copper thickness of PCB have their own characteristics, which need to be comprehensively considered based on the design requirements and cost factors of the circuit board.